Interview With An Epic Hacker Icon the Legendary [but very real] Captain Crunch

Legendary hacker John Draper is known under the alias of Captain Crunch since he used a Captain Crunch cereal whistle to make free phone calls.

Draper then built the phone phreaking tool called blue box that made free calls by making phone calls appear to be toll-free 800-number calls. The computer programmer and former phone phreak inspired Steve Jobs and Steve Wozniak who founded Apple Computer. Draper also invented EasyWriter, the first ever w

Source:
http://blogs.computerworld.com/17600/interview_with_iconic_hacker_captain_crunch